When comparing Shoot 'Em Up Kit vs GameGuru, the Slant community recommends GameGuru for most people. In the question“What are the best 3D game engines?”GameGuru is ranked 24th while Shoot 'Em Up Kit is ranked 44th. The most important reason people chose GameGuru is:

Simplicity and accessibility are the core design goals of FPS Creator Reloaded.

Active and helpful community

Pro

Continuous development and updates

News and improvements are released on a monthly schedule. Interaction between The Game Creators and project backers is excellent.

Pro

Feature priorities are chosen by the community

The Game Creators team frequent the forums and ask the community for feeback and suggestions both there and via an open poll on the website. They have a great history of reading suggestions, viewing screenshots, and generally working with the community.

Pro

Awesome tech support

Pro

Massive community of users

The gamer creator forums have a large number of users, developing games, making models for sale and to give away for other users. They answer questions, help each other with problems in their games, and can make using this software so much more fun and easy.

Pro

Easy to use your own custom assets

Easily import your own 3D models with the built-in importer and create custom characters with the Character creator. Custom weapons are much more difficult, though.

Pro

Friendly GUI

Awesome friendly GUI, and quite easy to use.

Pro

Easy to use editor

An easy 3D editor to create your own maps in seconds with drag-and-drop function.

Pro

Royalty free

Games you publish with GameGuru can be sold without any restrictions or commissions.

Pro

Building editor

Currently in development but already looking very good! Easily create big and customized buildings with default building blocks and share them with others.

Also very easy to use in the designer: The buildings are treated like entities but still directly available in the 'building editor mode'.

Pro

Powerful scripting language

Uses Lua.

Pro

Large asset store

A store where you can buy various assets for your games like sounds, 3D models, weapons... Very good prices and a lot of assets are even free.

Pro

Optimised engine for editor

The game engine is optimized for efficient use of memory.

Cons

Con

Lacking some details

No information on file formats or codecs in the manual.

Con

Tutorials are too short and too old

The only real tutorial videos are 1 or 2 minutes long, and date from 2013.

Con

Currently in beta

FPSCR is currently a beta product with features potentially important to a specific project still in the roadmap. Obviously this is expected of a beta product, and new features are constantly being added, but should be taken into consideration when choosing a game engine for a game right now. To see what's currently implemented, being implemented and in the roadmap go here.

Con

Windows only

There is only one supported platform. No macOS/Linux or mobile.

Con

Lack of user-interface

Although you can customize a lot, the user-interface does not show that. But plans are in place to improve this with some front facing GUI into the LUA scripts so you don't need to code as much.